Do you know how many steps it takes to make a thermos?
The production of thermos flasks involves a series of delicate process steps. The following are the main steps involved in making an insulated cup and the quality requirements for each step:
1. Shell processing flow
- Outer tube collaterals: to ensure that the material size is accurate.
- Cutting the tube: Use a lathe to carry out, to avoid the production of pits, dents, pockmarks.
- Expansion: carried out on a large press to ensure that the shell shape and size meet the requirements.
- Segmentation: use instrumentation lathe to cut off the water expanded shell, pay attention to the size and quality of the cut.
- Roll the centre corner: use lathe to roll round the two side corners of the inner concave of the shell to avoid producing defective products.
- Shrink the bottom: use the lathe to shrink the bottom of the shell to ensure the accuracy of the size.
- Cutting bottom: use lathe to cut the bottom of the shell, pay attention to cut evenly without defects.
- Punching: Flatten the welded seam at the shell mouth on a small press to ensure smooth welded seams.
- Cleaning and drying: Thoroughly clean and dry the shell to avoid pits, dents and pockmarks.
- Inspection and knocking pits: check whether there are pits and dents in the shell and knock them flat.
2. Inner shell processing flow
- Inner tube collaterals: make sure the inner tube size is accurate.
- Cutting: Use lathe to avoid defective products.
- Flatten the tube: use the instrument car to flatten one end of the tube mouth to ensure the evenness of the flat mouth.
- Expanding shape: use big press, pay attention to the pit, size and shape of the product.
- Roll the upper corner: use the lathe to roll the protruding corner of the inner liner to avoid producing defective products.
- Flat top of the inner liner: use instrument lathe to make sure the flatness is even and no gap.
- Threading: Use special threading machine to adjust the depth of thread to meet the size requirements.
- Cleaning and drying: clean and dry the inner liner to avoid pits, dents and pockmarks.
- Inspection and knocking: check whether there are pits and dents in the inner liner and knock them flat.
- Butt-welding: Butt-welding the inner liner with the inner bottom to make sure the weld seam is smooth and without holes.
- Water test leakage: inflatable water test liner, check whether the butt weld has a leak.
3 shell and shell assembly process
- Matching cup: close the inner shell to ensure that the cup is flat and close.
- Weld the bottom of the weld: in accordance with the instructions, to ensure that the weld and rounded.
- Spot Welding: Spot weld absorbent in the bottom, pay attention to the time limit.
- Pressing the centre bottom: press the centre bottom with spot weld absorbent to ensure flatness.
- Inspection of the weld base: Inspection of the weld base, picking out defective products.
- Vacuuming: vacuum without tail, strictly enforce the standard.
- Temperature measurement: check whether the cup is vacuum, pick out the non-vacuum cup.
- Electrolysis: outsourcing electrolysis, bright and even without defects.
- Polishing: shell polishing fine, no obvious defects.
- Inspection polishing: check the polishing quality, unqualified re-polishing.
- Pressing the outer bottom: press the outer bottom of the polished cups, make sure it is flat.
- Paint spraying: external spraying, even and firm colour, no paint falling off, pockmarks.
- Inspection of painting: check the quality of painting, fail to re-treat.
- Silkscreen: Silkscreen the logo according to the requirements, clear and error-free.
- Packing: Pack the finished insulation cups, ready for storage.
Throughout the production process, pay attention to the precision of operation and product quality control to ensure that each step meets the requirements to produce high quality insulation cups.
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